Cross-modal cueing effects of visuospatial attention on conscious somatosensory perception
Objective: The impact of visuospatial attention on perception with supraliminal stimuli and stimuli at the threshold of conscious perception has been previously investigated. In this study, we assess the cross-modal effects of visuospatial attention on conscious perception for near-threshold somatos...
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doaj-e2362aba43504951b7a6e9383f9df1f52020-11-25T02:54:55ZengElsevierHeliyon2405-84402018-04-0144e00595Cross-modal cueing effects of visuospatial attention on conscious somatosensory perceptionDeniz Doruk0Lorena Chanes1Alejandra Malavera2Lotfi B. Merabet3Antoni Valero-Cabré4Felipe Fregni5Neuromodulation Center, Spaulding Rehabilitation Hospital, Harvard Medical School, Charlestown, MA 02129, USANeuromodulation Center, Spaulding Rehabilitation Hospital, Harvard Medical School, Charlestown, MA 02129, USA; Université Pierre et Marie Curie, CNRS UMR 7225-INSERM UMRS S975, Centre de Recherche de l'Institut du Cerveau et la Moelle (ICM), 75013 Paris, France; Department of Clinical and Health Psychology, Serra Húnter Fellow, Universitat Autònoma de Barcelona, Catalunya, SpainNeuromodulation Center, Spaulding Rehabilitation Hospital, Harvard Medical School, Charlestown, MA 02129, USALaboratory for Visual Neuroplasticity, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA 02114, USAUniversité Pierre et Marie Curie, CNRS UMR 7225-INSERM UMRS S975, Centre de Recherche de l'Institut du Cerveau et la Moelle (ICM), 75013 Paris, France; Laboratory for Cerebral Dynamics Plasticity & Rehabilitation, Boston University School of Medicine, Boston, MA 02118, USA; Cognitive Neuroscience and Information Technology Research Program, Open University of Catalonia (UOC), 08035 Barcelona, Spain; Corresponding authors.Neuromodulation Center, Spaulding Rehabilitation Hospital, Harvard Medical School, Charlestown, MA 02129, USA; Corresponding authors.Objective: The impact of visuospatial attention on perception with supraliminal stimuli and stimuli at the threshold of conscious perception has been previously investigated. In this study, we assess the cross-modal effects of visuospatial attention on conscious perception for near-threshold somatosensory stimuli applied to the face. Methods: Fifteen healthy participants completed two sessions of a near-threshold cross-modality cue-target discrimination/conscious detection paradigm. Each trial began with an endogenous visuospatial cue that predicted the location of a weak near-threshold electrical pulse delivered to the right or left cheek with high probability (∼75%). Participants then completed two tasks: first, a forced-choice somatosensory discrimination task (felt once or twice?) and then, a somatosensory conscious detection task (did you feel the stimulus and, if yes, where (left/right)?). Somatosensory discrimination was evaluated with the response reaction times of correctly detected targets, whereas the somatosensory conscious detection was quantified using perceptual sensitivity (d′) and response bias (beta). A 2 × 2 repeated measures ANOVA was used for statistical analysis. Results: In the somatosensory discrimination task (1st task), participants were significantly faster in responding to correctly detected targets (p < 0.001). In the somatosensory conscious detection task (2nd task), a significant effect of visuospatial attention on response bias (p = 0.008) was observed, suggesting that participants had a less strict criterion for stimuli preceded by spatially valid than invalid visuospatial cues. Conclusions: We showed that spatial attention has the potential to modulate the discrimination and the conscious detection of near-threshold somatosensory stimuli as measured, respectively, by a reduction of reaction times and a shift in response bias toward less conservative responses when the cue predicted stimulus location. A shift in response bias indicates possible effects of spatial attention on internal decision processes. The lack of significant results in perceptual sensitivity (d′) could be due to weaker effects of endogenous attention on perception.http://www.sciencedirect.com/science/article/pii/S2405844017308563NeuroscienceNeurologyPhysiologyMedical imaging |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Deniz Doruk Lorena Chanes Alejandra Malavera Lotfi B. Merabet Antoni Valero-Cabré Felipe Fregni |
spellingShingle |
Deniz Doruk Lorena Chanes Alejandra Malavera Lotfi B. Merabet Antoni Valero-Cabré Felipe Fregni Cross-modal cueing effects of visuospatial attention on conscious somatosensory perception Heliyon Neuroscience Neurology Physiology Medical imaging |
author_facet |
Deniz Doruk Lorena Chanes Alejandra Malavera Lotfi B. Merabet Antoni Valero-Cabré Felipe Fregni |
author_sort |
Deniz Doruk |
title |
Cross-modal cueing effects of visuospatial attention on conscious somatosensory perception |
title_short |
Cross-modal cueing effects of visuospatial attention on conscious somatosensory perception |
title_full |
Cross-modal cueing effects of visuospatial attention on conscious somatosensory perception |
title_fullStr |
Cross-modal cueing effects of visuospatial attention on conscious somatosensory perception |
title_full_unstemmed |
Cross-modal cueing effects of visuospatial attention on conscious somatosensory perception |
title_sort |
cross-modal cueing effects of visuospatial attention on conscious somatosensory perception |
publisher |
Elsevier |
series |
Heliyon |
issn |
2405-8440 |
publishDate |
2018-04-01 |
description |
Objective: The impact of visuospatial attention on perception with supraliminal stimuli and stimuli at the threshold of conscious perception has been previously investigated. In this study, we assess the cross-modal effects of visuospatial attention on conscious perception for near-threshold somatosensory stimuli applied to the face. Methods: Fifteen healthy participants completed two sessions of a near-threshold cross-modality cue-target discrimination/conscious detection paradigm. Each trial began with an endogenous visuospatial cue that predicted the location of a weak near-threshold electrical pulse delivered to the right or left cheek with high probability (∼75%). Participants then completed two tasks: first, a forced-choice somatosensory discrimination task (felt once or twice?) and then, a somatosensory conscious detection task (did you feel the stimulus and, if yes, where (left/right)?). Somatosensory discrimination was evaluated with the response reaction times of correctly detected targets, whereas the somatosensory conscious detection was quantified using perceptual sensitivity (d′) and response bias (beta). A 2 × 2 repeated measures ANOVA was used for statistical analysis. Results: In the somatosensory discrimination task (1st task), participants were significantly faster in responding to correctly detected targets (p < 0.001). In the somatosensory conscious detection task (2nd task), a significant effect of visuospatial attention on response bias (p = 0.008) was observed, suggesting that participants had a less strict criterion for stimuli preceded by spatially valid than invalid visuospatial cues. Conclusions: We showed that spatial attention has the potential to modulate the discrimination and the conscious detection of near-threshold somatosensory stimuli as measured, respectively, by a reduction of reaction times and a shift in response bias toward less conservative responses when the cue predicted stimulus location. A shift in response bias indicates possible effects of spatial attention on internal decision processes. The lack of significant results in perceptual sensitivity (d′) could be due to weaker effects of endogenous attention on perception. |
topic |
Neuroscience Neurology Physiology Medical imaging |
url |
http://www.sciencedirect.com/science/article/pii/S2405844017308563 |
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